Wide Angle Lens Video Frame Distortion Correction
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Solution Overview
Problem
Videoconferencing systems using wide angle lenses face issues with distortion and deformation in images, leading to abrupt transitions when switching between views, which degrade the user experience.
Innovation Solution
A method and system that corrects distortion and deformation in video frames captured by a wide angle lens by generating transitional video frames through deformation and distortion correction logic, applied via a video module in a conferencing endpoint, ensuring smooth transitions between different views.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If distortion or deformation correction is applied to cropped video frames from a wide angle lens, then image quality is improved, but transitions between views become abrupt and discontinuous
Solution Approach 1:
The system pre-calculates and stores distortion correction parameters for multiple possible views (room view, talker views, whiteboard views) before transitions occur. By preparing corrected versions of each view in advance, the system can switch between them smoothly without real-time computation delays or abrupt changes, resolving the contradiction between maintaining image quality and ensuring transition stability.
2Area of stationary object
If a wide angle lens is used to capture multiple participants, then the field of view is improved, but distortion and deformation in the captured images increase
Solution Approach 1:
The system applies different distortion correction parameters depending on the specific view being displayed. For room views showing multiple participants, one set of correction parameters is used, while for cropped talker views or whiteboard views, different correction parameters are applied. This allows the system to maintain the wide field of view capability while dynamically adjusting image accuracy parameters to suit each specific viewing context.
3Manufacturing precision
If real-time distortion correction is applied during view switching, then image quality is improved, but processing time and computational complexity increase
Solution Approach 1:
The system pre-calculates distortion correction for multiple predetermined views and stores these corrected images or pre-processing parameters. When a view switch occurs, the system simply retrieves and displays the pre-corrected view rather than performing real-time distortion correction computation. This eliminates processing delays during transitions while maintaining high image quality, effectively resolving the time-quality contradiction.
Data Source
AI summary
A method may include receiving a source video frame captured using a wide angle lens, deriving a characteristic of a target video frame from the source video frame, generating a transitional video frame using the source video frame and the target video frame, and transmitting the transitional video frame to an endpoint.